Date: Wed Feb 14 11:09:26 2007

Author: Erich Burton

Subject: Re: Reading Capacitor Values

Post:

Ceramic disk capacitors are generally valued in pF. The first
two numbers are significant digits. The third digit, if present
is a multiplier exponent, similar to a resistor.

So:

22 = 22pf

333 = 33000pf

A single letter generally indicates tolerance, with K = 10%.
"B" is the best, "Z" is the worst, tolerancewise.

There are variations, though, so if you have a lot of surplus
caps, or you are not sure, it is handy to have a DMM with a
capacitance meter available.

More capacitance codes:

http://xtronics.com/kits/ccode.htm

I hope this helps.

-Erich

____________________________________
Erich Burton 3-2602 eburton@bu.edu
Boston University Physics Department

Back